The olive-skinned Black Swan stunner, 27, gained a Golden Globe nod and lost her beau of six years all in the same month, In Touch Weekly blabs on the pages of its Jan. 10 edition.

“He’s heartbroken,” according to a snoop with ties to Culkin, 30. “They broke up a while ago but kept it quiet.”

Friends say Mila’s blooming career portfolio and long-distance began to weigh heavy on the once hopelessly-in-love twosome. The decision to split was reportedly a mutual one.

“Mac lives in New York and she lives in LA, and since her career took off, it was too hard to keep the relationship going.”

Kunis — who was notoriously quiet about her romance with the divorced ex-child star — offered a rare glimpse into life with Macaulay when she gushed about the My Girl actor in an interview earlier this year: “He’s an amazing guy, who is probably the most brilliant person I’ve ever met. He’s so, so smart and so aware and so kind.”